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1 definition found

From: WordNet (r) 2.0

 rosebay willowherb
      n : tall North American perennial with creeping rootstocks and
          narrow leaves and spikes of pinkish-purple flowers
          occurring in great abundance in burned-over areas or
          recent clearings; an important honey plant [syn: fireweed,
           giant willowherb, wickup, Epilobium angustifolium]